Hollow Fibre Solid Oxide Fuel Cells

固体氧化物燃料电池（SOFC），以其高（高达80%）的化学到电/热转换效率，其在燃料摄入（氢气，天然气，甲醇和其他石油产品等）的多功能性而闻名。和相对环境友好的操作，具有很高的市场潜力，但由于突出的技术和经济问题，尚未大规模生产。本拟议项目旨在解决这些问题，建立可行性，并开发一种新的设计，固体氧化物燃料电池，使用中空纤维制造，从而增加电极的比表面积，增加每单位体积/质量的功率输出，便于在高温下密封并降低成本。中空纤维配置中的电解质将首先通过相转化/烧结组合技术制造，并且由薄的致密层组成，两侧具有集成的多孔子层。然后将多孔子层与阳极和阴极材料一起沉积，以产生单个中空纤维SOFC，随后将其束组装成SOFC堆。单电池和固体氧化物燃料电池堆的性能将作为一个功能的制造和操作参数进行研究。最初，钇稳定的氧化锆（YSZ）将被用作电解质，因为以纤维形式生产这种电解质的可行性已经建立，尽管尚未达到< 10微米的目标电解质厚度和所需的结构;为了将工作温度从约100 ℃降低到约100 ℃，我们将在200 ℃下生产这种电解质。900至500-750 C，随后将使用Ce0.9Gd0.1O1.95（CGO）电解质。由于本提案涉及确定反应堆设计概念的可行性，因此将在镍阳极使用氢作为模型燃料，并在La0.6Sr0.4Co0.2Fe0.8O3（LSCF）阴极进行氧还原;使用其他燃料的反应堆性能将成为后续项目提案的一部分。

Solid Oxide Fuel Cells (SOFCs), known for their high (up to 80%) chemical to electrical/thermal conversion efficiencies, their versatility in fuel intake (hydrogen, natural gas, methanol and other petroleum products etc.) and their relatively environmentally benign operation, have a high market potential, but are not yet mass produced, because of outstanding technological and economic issues.This proposed project aims to address these problems by establishing the feasibility of, and developing, a novel design of SOFC, fabricated using hollow fibres, thereby increasing the specific surface area of electrodes, increasing the power output per unit volume/mass, facilitating sealing at high temperatures, and decreasing costs. The electrolyte in the hollow fibre configuration will be fabricated firstly by a combined phase inversion/sintering technique and consists of a thin dense layer, with integrated porous sub-layers on both sides. The porous sub-layers will then be deposited with anode and cathode materials, to produce a single hollow fibre SOFC, bundles of which will be assembled subsequently into a SOFC stack. The performance of both single cells and SOFC stacks will be investigated as a function of the fabrication and operational parameters. Initially, yttrium-stabilised zirconia (YSZ) will be used as the electrolyte, as the feasibility of producing this in fibre form has already been established, though not yet at the targeted electrolyte thickness of < 10 micron and with the required structure; to decrease operating temperatures from ca. 900 to 500-750 C, Ce0.9Gd0.1O1.95 (CGO) electrolyte will be used subsequently. As this proposal is concerned with establishing feasibility of the reactor design concept, hydrogen will be used as a model fuel at Ni anodes, coupled to oxygen reduction at La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathodes; reactor performance with other fuels would be part of a subsequent project proposal.